Tunnel Seismic Prediction (TSP 203)

Tunnelling - a business with hidden pitfalls
The trend towards mechanised production in underground construction is unmistakable. Successful tunnel builders are relying on state- of- the- art, high performance, but capital intensive heading techniques backed by sophisticated logistics systems. These are designed to produce an uninterrupted advance with calculable risks and a high degree of efficiency.
Hidden risks
Ground conditions can, as always, be a source of unexpected difficulties where hidden geological hazards lie in wait. Unforeseen changes in rock quality all too often cause unnecessarily costly downtime and problems, which today nobody can afford.

Without prediction you run the risk of:
— Cave-in, collapse, heavy water inflow
— Expensive downtimes
— Entrapment of TBMs
— Endangerment of people and equipment

Knowing what's ahead
Advance notice of lithological heterogeneity and any variation in rock mechanical parameters which can have an effect on the construction techniques selected, is an important factor in the success of any tunnel advance. Such early warning makes it possible to ensure that spe-cific counter-measures and logistical procedures are planned in good time. Continuous, high-quality predictions make the risks inherent in tunnelling quantifiable.
The Difference is in the Details
Practical system components, a thorough measuring concept, and brilliant software are the
decisive factors which make the difference. In comparison to conventional prediction techniques, TSP 203 offers a superior method combined with practical advantages:

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